<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
       <input type="button" value="v-on指令" v-on:click="doit">
       <input type="button" value="v-on简写" @click="doit">
       <input type="button" value="双击事件" name="" id="" @dblclick="doit">
        <h2 @click="change">
            {{food}}
        </h2>

    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>
    var app=new Vue({
        el:"#app",
        data:{
            message:"lll",
            food:"西蓝花炒蛋"
        },
        methods: {
            doit:function(){
                alert("做it");
            },
            change:function(){
                // alert(this.food)
                this.food+="好好吃"
            }
        }
    
    })
</script>
    
</body>
</html>